experiment

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

controllers.my-route.js

import Ember from 'ember';

export default Ember.Controller.extend({
  className:"red",
  actions:{
    toggleColor: function(){
      if(this.get("className") == "red"){
        this.set("className","blue");
      }else{
        this.set("className","red");
      }
    }
  }
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('my-route', {});
});


export default Router;

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  beforeModel() {
    this.replaceWith('my-route');
  }
});

routes.my-route.js

export default Ember.Route.extend({
  model: function() {
    var companies = [{
      "name" : "Company 1",
      "headquarters": "Mountain View, California, United States of America",
      "revenue":"59825000000"
    },{
      "name" : "Company 2",
      "headquarters":"Menlo Park, California, United States of America",
      "revenue":"7870000000"
    },{
      "name" : "Company 3",
      "revenue": "664000000",
      "headquarters":"San Francisco, California, United States of America"
    }];
    return companies;
  }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.red {
color: red;
}
.blue {
color: blue
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#link-to 'my-route'}} Test {{/link-to}}
{{outlet}}
<br>
<br>
Footer (C)

templates.my-route.hbs

my-route
<hr size=1 />
{{input type="text" value=firstName disabled=nameDisabled size="40"}}

<table id="t01">
 <tr>
   <th>Company Name</th>
   <th>Headquarters</th>
   <th>revenue</th>
 </tr>
 {{#each model as |item|}}
 <tr>
  <td >{{item.name}}</td>
  <td class={{className}}>{{item.headquarters}}</td>
  <td>{{item.revenue}}</td>
 </tr>
 {{/each}}
</table>
<button {{action "toggleColor"}}> Change color </button>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}